WASHINGTON – The NL East champion Washington Nationals secured home-field advantage throughout the postseason by beating the Philadelphia Phillies 5-1 Wednesday for their majors-high 98th victory, with Ryan Zimmerman homering moments after the Teddy Roosevelt mascot won the Presidents Race at Nationals Park for the first time.

By winning their regular-season finale, the Nationals clinched top seeding for the NL playoffs and will open on the road Sunday at the winner of Friday's wild-card game between Atlanta and St. Louis. Game 2 will also be at the wild-card winner's stadium, before the best-of-five series shifts to Washington.

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Before Wednesday's game, the Nationals were fitted for hats with postseason patches.